In 2018, a former Marine combat veteran killed 12 people in a bar in Thousand Oaks.
The deadliest shooting in modern California history was in 1984 when a gunman killed 21 people at a McDonald's restaurant in San Ysidro, near San Diego.
- THOUSAND OAKS, Nov. 7, 2018 - A former Marine combat veteran killed 12 people in a bar in Thousand Oaks, California, a suburb of Los Angeles.
- WASHINGTON, Sept. 16, 2013 - A former Navy reservist working as a government contractor killed 12 people at the Washington Navy Yard.
- AURORA, July 20, 2012 - A masked gunman killed 12 people at a cinema in Aurora, Colorado.